Methods: Children requiring super selective ophthalmic artery chemotherapy for retinoblastoma are prospectively included in this observational study. Endovascular procedures are performed under standardized and deep general anesthesia with sevoflurane, sufentanil and rocuronium. SCRE are strictly pre-defined and included arterial hypotension, bradycardia and bronchospasm. SCRE are recorded and the factors influencing their occurrence are investigated.